Patents by Inventor Surendra J. Perera

Surendra J. Perera has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7242923
    Abstract: A method is provided for authenticating a wireless device with a fixed station. A first authentication request is received from the wireless device when the wireless device detects that the fixed station is in close proximity, and a second authentication request is received from the fixed station when the fixed station detects that the wireless device is in close proximity. The first authentication request includes a first unique identifier for identifying the wireless device and a second unique identifier for identifying the fixed station, and the second authentication request includes the second unique identifier.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: July 10, 2007
    Assignee: Motorola, Inc.
    Inventors: Surendra J. Perera, Deepak P. Ahya, Yanchen Qi
  • Patent number: 5831636
    Abstract: A compression/decompression method useful in communicating ideographic characters to communication devices. An ideographic character is represented by a compressed character codeword including information defining a structure type or layout of the character, together with primitive types that represent combinations of simple graphical elements. A character generator read-only memory (CGROM) (20) includes a compressed character codeword database (22) and a primitive type database (24). Character codes corresponding to a compressed character codeword are transmitted to a communication device (600), such as a selective call receiver. The communication device (600) includes a microprocessor/controller (50) that decompresses the compressed character codewords corresponding to the character codes based on the data stored in the character database (22) and the primitive type database (24).
    Type: Grant
    Filed: November 26, 1996
    Date of Patent: November 3, 1998
    Assignee: Motorola
    Inventors: Zaffer S. Merchant, Warren P. Glotzbach, Surendra J. Perera